daveysmith0911

I have recently had a system installed with 4 of the new AM2s, and had the same question. Unfortunately came across your post late, but glad it is not just me - as I also noticed the discrepancy between the label on the side of the batteries and both the hubble website and the ver2.0 manual, which both specify the 53.8V values. However, in contrast to you, when I contacted hubble, their technical support advised me that I should be using 52.8V for both the float and bulk values. I have asked them to confirm, and they confirm these values. If this is true, then it also means that the BMS is wrong as it happily charges the batteries to 53.8V. It blows my mind that there is such a difference in the information provided for a product where you are constantly told how it is important it is to enter the correct values for batteries otherwise you can damage them and reduce their lifespan.

Thanks for your input - I asked the Hubble tech to clarify the discrepancy, and he did not respond. 🤨 I have now installed Solar Assistant and observed it as the BMS controlled charging to 100%, and that now shows the Battery voltage as 53.7V. Interestingly, my total capacity is shown as 508Ah or 127Ah per battery pack ...mine are rated at 125Ah each .

Hello everybody😁 - We just recently had our installation finished with a Deye 12kW3ph inverter and 4 x Hubble Lithium AM2 Batteries. The folks that did the installation used the AM2 Ver2.0 Manual for the installation, this specifies Bulk/Equalisation Charge 53.8V , and Float Charge 53.8V I noticed that the batteries have a sticker on the side which has different settings, Equalized Voltage 53.6V , and float voltage 52.6V. So, I went along to the website which confirmed that the AM2 Ver2.0 Manual settings are the right ones - Bulk/Equalisation Charge 53.8V , and Float Charge 53.8V. Now that I had conflicting information, I decided to contact Hubble Technical Support just to make sure, which one I should use and they came back with a completely different set of settings, and told me to use Bulk 52.8 , Float 52.8 , so now I have three different sets of settings, and don't know what to believe 🙄. There is a big difference between 52.8 and 53.8V at the upper end - I'd really appreciate some clarity from those in the know. Thank you